(* Basic_2A1: uses: lpxs_fpbg *)
lemma lpxs_rneqx_fpbg:
- â\88\80G,L1,L2,T. â\9dªG,L1â\9d« ⊢ ⬈* L2 →
- (L1 â\89\85[T] L2 â\86\92 â\8a¥) â\86\92 â\9dªG,L1,Tâ\9d« > â\9dªG,L2,Tâ\9d«.
+ â\88\80G,L1,L2,T. â\9d¨G,L1â\9d© ⊢ ⬈* L2 →
+ (L1 â\89\85[T] L2 â\86\92 â\8a¥) â\86\92 â\9d¨G,L1,Tâ\9d© > â\9d¨G,L2,Tâ\9d©.
#G #L1 #L2 #T #H #H0
elim (lpxs_rneqg_inv_step_sn … H … H0) -H -H0
/4 width=10 by fpbc_fpbs_fpbg, lpxs_feqg_fpbs, lpx_fpbc, feqg_intro_sn, sfull_dec/